浅谈spring-boot 允许接口跨域并实现拦截（CORS）_JAVA教程

浅谈spring-boot 允许接口跨域并实现拦截（CORS）

2020-12-18 11:58bluecrop JAVA教程

本篇文章主要介绍了浅谈spring-boot 允许接口跨域并实现拦截（CORS），具有一定的参考价值，有兴趣的可以了解一下

本文介绍了spring-boot 允许接口跨域并实现拦截（CORS），分享给大家，也给自己留个笔记

pom.xml(依赖的jar)

				?

									// 在spring-boot-starter-web的启动器中，已经依赖好了

									<dependency>

									      <groupId>org.springframework.boot</groupId>

									      <artifactId>spring-boot-starter-web</artifactId>

									</dependency>

CORS跨域的配置（主要配置允许什么样的方法跨域）

				?

									import org.springframework.context.annotation.Bean;

									import org.springframework.context.annotation.Configuration;

									import org.springframework.web.cors.CorsConfiguration;

									import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

									import org.springframework.web.filter.CorsFilter;

									import org.springframework.web.servlet.config.annotation.CorsRegistry;

									import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

									import java.util.ArrayList;

									import java.util.List;

									/**

									 * Created by Msater Zg on 2017/4/3.

									 */

									@Configuration

									public class CorsConfig extends WebMvcConfigurerAdapter {

									  @Override

									  public void addCorsMappings(CorsRegistry registry) {

									    registry.addMapping("/**")

									        .allowedOrigins("*")

									        .allowCredentials(true)

									        .allowedMethods("GET", "POST", "DELETE", "PUT")

									        .maxAge(3600);

									  }

									  private CorsConfiguration buildConfig() {

									    CorsConfiguration corsConfiguration = new CorsConfiguration();

									    List<String> list = new ArrayList<>();

									    list.add("*");

									    corsConfiguration.setAllowedOrigins(list);

									    /*

									    // 请求常用的三种配置，*代表允许所有，当时你也可以自定义属性（比如header只能带什么，只能是post方式等等）

									    */

									    corsConfiguration.addAllowedOrigin("*"); 

									    corsConfiguration.addAllowedHeader("*"); 

									    corsConfiguration.addAllowedMethod("*"); 

									    return corsConfiguration;

									  }

									  @Bean

									  public CorsFilter corsFilter() {

									    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();

									    source.registerCorsConfiguration("/**", buildConfig());

									    return new CorsFilter(source);

									  }

									}

拦截器配置(可以根据不同路径，配置不同的拦截器)

				?

									import org.springframework.web.servlet.HandlerInterceptor;

									import org.springframework.web.servlet.ModelAndView;

									import javax.servlet.http.HttpServletRequest;

									import javax.servlet.http.HttpServletResponse;

									/**

									 * Created by Msater Zg on 2017/4/5.

									 * 拦截器

									 */

									public class ApiInterceptor implements HandlerInterceptor {

									  @Override

									  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

									    // 请求前调用

									    System.out.println("拦截了");

									    return true;

									  }

									  @Override

									  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

									    // 请求过程中调用

									    System.out.println("拦截了");

									  }

									  @Override

									  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

									    // 请求完成时调用

									    System.out.println("拦截了");

									  }

									}

拦截器管理类，用于生成项目的拦截器链

				?

									import org.springframework.context.annotation.Configuration;

									import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

									import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

									/**

									 * Created by Msater Zg on 2017/4/5.

									 * 拦截器管理工具

									 */

									@Configuration

									public class MyWebAppConfigurer extends WebMvcConfigurerAdapter {

									  @Override

									  public void addInterceptors(InterceptorRegistry registry) {

									    // 多个拦截器组成一个拦截器链

									    // addPathPatterns 用于添加拦截规则

									    // excludePathPatterns 用户排除拦截

									    registry.addInterceptor(new ApiInterceptor()).addPathPatterns("/user/**"); //对来自/user/** 这个链接来的请求进行拦截

									    super.addInterceptors(registry);

									  }

									}